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Stall current rating of T200 thrusters?


(Nitesh Singh) #1

We will soon be using T200 thrusters for our commercial product which has to run in dirty water. So what will happen if suppose something gets stuck in the motor and still we are trying to rotate it? Will the motor burn? And by something stuck i mean to say soft things such as weeds.
And also what if some sand enters the motors during its operation in water, will it get removed automatically or do the user has the option to open the motor and clean it wherever the sand might have entered the thrusters as the water is acting like lubricant in the thrusters.


(Adam) #2

Hi @nitesh,

Please see this post for current draw information:

“Stall current” is a bit of a misnomer is brushless sensorless motors like ours. As feedback is required to commutate the motor, its not even possible to run below a certain RPM, and thus current will not be drawn in the traditional sense when stalled. This behavior is mostly determined by the ESC rather than the motor. With the Basic ESC, the T200 will stop running below about 300 RPM. If stalled, the ESC will detect this and stop running the motor until reinitialized with a 1500µs neutral signal. If still stalled the process will repeat, otherwise it will resume running normally. As previously noted, the stall behavior and recovery is dependent on the ESC used.

If the sediment you are running in has ferrous particles, you will need to periodically open the thruster and remove this buildup from the rotor magnets manually.

-Adam


(Nitesh Singh) #3

@adam Is opening the motors and reaching the magnets and closing them again an easy process? As we have to sell the machine and the client has to do this process.


(Willian Galvani) #4

Hi @nitesh,

You can find the instructions for disassembly here.


(Nitesh Singh) #5

@williangalvani the instruction only shows how to change the propellars but since our machines would be running in dirty water we need to cleaan ut regukarly from within. Anything which can help us with this?


(Adam) #6

Hi @nitesh,

Sorry about that, those instructions are not quite complete! Once the shaft collar has been removed in steps 5 and 6, the rotor can be pulled off with the propeller. Just pull it straight off the stator/thruster core. Updating these instructions slipped through our recent improvements to the documentation, we’ll be taking care of it.

-Adam